{
  "manageEntity": {
    "action": "Save",
    "entityId": "692380412",
    "entityType": "Track",
    "nonce": "0x19d2d37e709f07dfc8b006f632528673bb7856e47e551f2db12fb1074083e0ce",
    "signature": "0xe889547240e3ad3c69394cc0f9633581a7e8b91cc7f54e7c3c684d827438852077c9bf62833b29bf9be06873359faf547052a4c94c065b7cd686ca564be3d6681c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}